<template>
	<view class="cart-box" v-if="cart.length !== 0">
		<!-- 收获地址区域 -->
		<my-address></my-address>
		
		<!-- 购物车商品列表的标题区域 -->
		<view class="cart-title">
			<!-- 左侧的图标 -->
			<uni-icons type="shop" size="18"></uni-icons>
			<!-- 右侧的文本 -->
			<text class="cart-title-text">购物车</text>
		</view>
		
		<!-- 商品列表区域 -->
		<uni-swipe-action>
			<block v-for="(item, index) in cart" :key="index">
				<uni-swipe-action-item :right-options="options" @click="swipeItemClickHandler(item)">
					<my-goods
						:goods="item"
						:showRadio="true"
						:showNum="true"
						@radio-change="radioChangeHandler"
						@num-change="numberChangeHandler">
					</my-goods>
				</uni-swipe-action-item>
			</block>
		</uni-swipe-action>
		
		<!-- 结算区域 -->
		<my-settle></my-settle>
	</view>
	
	<!-- 空白购物车区域 -->
	<view v-else class="empty-cart">
		<image src="/static/cart_empty@2x.png" class="empty-img"></image>
		<text class="tip-text">空空如也</text>
	</view>
</template>

<script>
	import { mapState, mapMutations } from 'vuex'
	import tabbarBadge from '@/mixins/tabbr-badge.js'
	export default {
		mixins: [tabbarBadge],
		data() {
			return {
				options: [{
					text: '删除',
					style: {
						backgroundColor: '#C00000'
					}
				}]
			}
		},
		computed: {
			...mapState('m_cart', ['cart']),
		},
		methods: {
			...mapMutations({
				updateGoodsState: 'm_cart/updateGoodsState',
				updateGoodsCount: 'm_cart/updateGoodsCount',
				removeGoodsById: 'm_cart/removeGoodsById'
			}),
			// 商品的勾选状态发生了变化
			radioChangeHandler (e) {
				this.updateGoodsState(e)
			},
			// 商品的数量发生了变化
			numberChangeHandler (e) {
				this.updateGoodsCount(e)
			},
			// 滑动删除的点击回调
			swipeItemClickHandler (goods) {
				this.removeGoodsById(goods.goods_id)
			},
		}
	}
</script>

<style lang="scss">
.cart-box {
	padding-bottom: 50px;
}
.cart-title {
	height: 40px;
	display: flex;
	align-items: center;
	padding-left: 5px;
	border-bottom: 1px solid #efefef;
	.cart-title-text {
		font-size: 14px;
		margin-left: 10px;
	}
}

.empty-cart {
	padding-top: 150px;
	display: flex;
	flex-direction: column;
	align-items: center;
	.empty-img {
		width: 90px;
		height: 90px;
	}
	.tip-text {
		font-size: 12px;
		color: gray;
		margin-top: 15px;
	}
}
</style>
